Search Publications
Formation of layers of methane in the atmosphere of Mars after surface release
Daerden, F.; Neary, L.; Viscardy, S.
Simulations with a general circulation model for the atmosphere of Mars show that surface emissions of methane can result in a highly nonuniform vertical distribution throughout the atmosphere, including the formation of layers, during the first weeks after the release. The fate of the released methane is determined by the global circulation patte…
The XXL Survey. VIII. MUSE characterisation of intracluster light in a z ~ 0.53 cluster of galaxies
Pierre, M.; Willis, J.; Adami, C. +11 more
Aims: Within a cluster, gravitational effects can lead to the removal of stars from their parent galaxies and their subsequent dispersal into the intracluster medium. Gas hydrodynamical effects can additionally strip gas and dust from galaxies; both gas and stars contribute to intracluster light (ICL). The properties of the ICL can therefore …
Joint analysis of galaxy-galaxy lensing and galaxy clustering: Methodology and forecasts for Dark Energy Survey
Benoit-Lévy, A.; Nichol, R. C.; Finley, D. A. +69 more
The joint analysis of galaxy-galaxy lensing and galaxy clustering is a promising method for inferring the growth function of large-scale structure. Anticipating a near future application of this analysis to Dark Energy Survey (DES) measurements of galaxy positions and shapes, we develop a practical approach to modeling the assumptions and systemat…
The spectrum of Jupiter's Great Red Spot: The case for ammonium hydrosulfide (NH4SH)
Chanover, Nancy J.; Simon, Amy A.; Hudson, Reggie L. +1 more
Here we present new ultraviolet-visible spectra of irradiated ammonium hydrosulfide (NH4SH), a reported jovian atmospheric cloud component, for a range of temperatures and radiation doses and make assignments to the spectral features. We show that the combination of radiolysis and thermal annealing of NH4SH causes the origina…
Identifying IGR J14091-6108 as a magnetic CV with a massive white dwarf using X-ray and optical observations
Strader, Jay; Chomiuk, Laura; Rahoui, Farid +3 more
INTEGRAL Gamma-Ray (IGR) J14091-6108 is a Galactic X-ray source known to have an iron emission line, a hard X-ray spectrum, and an optical counterpart. Here, we report on X-ray observations of the source with XMM-Newton and NuSTAR as well as optical spectroscopy with European Southern Obseratory/Very Large Telescope and National Optical Astronomy …
The Detection and Statistics of Giant Arcs behind CLASH Clusters
Zheng, Wei; Zitrin, Adi; Frye, Brenda +10 more
We developed an algorithm to find and characterize gravitationally lensed galaxies (arcs) to perform a comparison of the observed and simulated arc abundance. Observations are from the Cluster Lensing And Supernova survey with Hubble (CLASH). Simulated CLASH images are created using the MOKA package and also clusters selected from the high-resolut…
Radio Galaxy Zoo: discovery of a poor cluster through a giant wide-angle tail radio galaxy
Heywood, I.; Vaughan, S.; Hardcastle, M. J. +15 more
We have discovered a previously unreported poor cluster of galaxies (RGZ-CL J0823.2+0333) through an unusual giant wide-angle tail radio galaxy found in the Radio Galaxy Zoo project. We obtained a spectroscopic redshift of z = 0.0897 for the E0-type host galaxy, 2MASX J08231289+0333016, leading to Mr = -22.6 and a 1.4 GHz radio luminosi…
The Simud-Tiu Valles hydrologic system: A multidisciplinary study of a possible site for future Mars on-site exploration
Pajola, Maurizio; Mancarella, Francesca; Rossato, Sandro +4 more
When looking for traces of past life on Mars, we have to look primarily for places where water was present, possibly for long time intervals. The Simud and Tiu Valles are two large outflow channels connected to the north with the Chryse Basin, Oxia Palus quadrangle. The area, carved by water during the Noachian/Early Hesperian is characterized by …
Mapping CO Gas in the GG Tauri A Triple System with 50 au Spatial Resolution
Tang, Ya-Wen; Dutrey, Anne; Di Folco, Emmanuel +11 more
We aim to unveil the observational imprint of physical mechanisms that govern planetary formation in the young, multiple system GG Tau A. We present ALMA observations of 12CO and 13CO 3-2 and 0.9 mm continuum emission with 0.″35 resolution. The 12CO 3-2 emission, found within the cavity of the circumternary dust ri…
The dustier early-type galaxies deviate from late-type galaxies' scaling relations
Barmby, P.; Madden, S. C.; Lianou, S. +1 more
Several dedicated surveys focusing on early-type galaxies (ETGs) reveal that significant fractions of them are detectable in all interstellar medium phases studied to date. We select ETGs from the Herschel Reference Survey that have both far-infrared Herschel and either H I or CO detection (or both). We derive their star formation rates (SFRs), st…